diff --git a/packages/babel-parser/README.md b/packages/babel-parser/README.md
index 91f6fbe0f1..663ed0875f 100644
--- a/packages/babel-parser/README.md
+++ b/packages/babel-parser/README.md
@@ -127,7 +127,7 @@ require("@babel/parser").parse("code", {
 | `typescript` ([repo](https://github.com/Microsoft/TypeScript)) | `var a: string = "";` |
 | `doExpressions` | `var a = do { if (true) { 'hi'; } };` |
 | `objectRestSpread` ([proposal](https://github.com/tc39/proposal-object-rest-spread)) | `var a = { b, ...c };` |
-| `decorators` (Stage 1) and `decorators2` (Stage 2 [proposal](https://github.com/tc39/proposal-decorators)) | `@a class A {}` |
+| `decorators` (Stage 2 [proposal](https://github.com/tc39/proposal-decorators)) and `decorators-legacy` (Stage 1) | `@a class A {}` |
 | `classProperties` ([proposal](https://github.com/tc39/proposal-class-public-fields)) | `class A { b = 1; }` |
 | `classPrivateProperties` ([proposal](https://github.com/tc39/proposal-private-fields)) | `class A { #b = 1; }` |
 | `classPrivateMethods` ([proposal](https://github.com/tc39/proposal-private-methods)) | `class A { #c() {} }` |
@@ -146,6 +146,25 @@ require("@babel/parser").parse("code", {
 | `pipelineOperator` ([proposal](https://github.com/babel/proposals/issues/29)) | `a \|> b` |
 | `nullishCoalescingOperator` ([proposal](https://github.com/babel/proposals/issues/14)) | `a ?? b` |
 
+
+#### Plugins options
+
+> NOTE: When a plugin is specified multiple times, only the first options are considered.
+
+- `decorators`:
+  - `decoratorsBeforeExport` (`boolean`)
+    ```js
+    // decoratorsBeforeExport: true
+    @dec
+    export class C {}
+
+    // decoratorsBeforeExport: false
+    export @dec class C {}
+    ```
+- `flow`:
+  - `all` (`boolean`)
+    <!-- TODO -->
+
 ### FAQ
 
 #### Will the Babel parser support a plugin system?
diff --git a/packages/babel-parser/src/parser/index.js b/packages/babel-parser/src/parser/index.js
index a84603c41c..8042410ff6 100644
--- a/packages/babel-parser/src/parser/index.js
+++ b/packages/babel-parser/src/parser/index.js
@@ -33,8 +33,8 @@ export default class Parser extends StatementParser {
 function pluginsMap(plugins: PluginList): PluginsMap {
   const pluginMap: PluginsMap = (Object.create(null): Object);
   for (const plugin of plugins) {
-    if (Array.isArray(plugin)) pluginMap[plugin[0]] = plugin[1] || {};
-    else pluginMap[plugin] = {};
+    const [name, options = {}] = Array.isArray(plugin) ? plugin : [plugin, {}];
+    if (!pluginMap[name]) pluginMap[name] = options || {};
   }
   return pluginMap;
 }
diff --git a/packages/babel-parser/test/plugin-options.js b/packages/babel-parser/test/plugin-options.js
new file mode 100644
index 0000000000..a2f29026b6
--- /dev/null
+++ b/packages/babel-parser/test/plugin-options.js
@@ -0,0 +1,31 @@
+import { parse } from "../lib";
+
+function getParser(code, plugins) {
+  return () => parse(code, { plugins, sourceType: "module" });
+}
+
+describe("plugin options", function() {
+  describe("the first options are used", function() {
+    // NOTE: This test is not specific about decorators, it can be applied
+    // to any plugin with options.
+
+    const NAME = "decorators";
+    const OPT_1 = [NAME, { decoratorsBeforeExport: true }];
+    const OPT_2 = [NAME, { decoratorsBeforeExport: false }];
+    const SYNTAX_1 = "@dec export class C {}";
+    const SYNTAX_2 = "export @dec class C {}";
+    const SYNTAX_DEFAULT = "export @dec class C {}";
+
+    it("when they aren't specified", function() {
+      expect(getParser(SYNTAX_DEFAULT, [NAME, OPT_1])).not.toThrow();
+      expect(getParser(SYNTAX_DEFAULT, [NAME, OPT_2])).not.toThrow();
+    });
+
+    it("when they are specified", function() {
+      expect(getParser(SYNTAX_1, [OPT_1, OPT_2])).not.toThrow();
+      expect(getParser(SYNTAX_2, [OPT_2, OPT_1])).not.toThrow();
+      expect(getParser(SYNTAX_1, [OPT_2, OPT_1])).toThrow();
+      expect(getParser(SYNTAX_2, [OPT_1, OPT_2])).toThrow();
+    });
+  });
+});